./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:33:33,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:33:33,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:33:34,018 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:33:34,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:33:34,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:33:34,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:33:34,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:33:34,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:33:34,041 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:33:34,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:33:34,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:33:34,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:33:34,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:33:34,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:33:34,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:33:34,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:33:34,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:33:34,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:33:34,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:33:34,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:33:34,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:33:34,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:33:34,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:33:34,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:33:34,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:33:34,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:33:34,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:33:34,114 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:33:34,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:33:34,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:33:34,118 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:33:34,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:33:34,123 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:33:34,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:33:34,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:33:34,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:33:34,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:33:34,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:33:34,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:33:34,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:33:34,131 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:33:34,195 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:33:34,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:33:34,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:33:34,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:33:34,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:33:34,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:33:34,202 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:33:34,202 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:33:34,203 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:33:34,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:33:34,204 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:33:34,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:33:34,205 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:33:34,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:33:34,206 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:33:34,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:33:34,207 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:33:34,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:33:34,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:33:34,209 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:33:34,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:33:34,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:33:34,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:33:34,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:33:34,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:33:34,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:33:34,213 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:33:34,213 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:33:34,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:33:34,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:33:34,214 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:33:34,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:33:34,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:33:34,215 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:33:34,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:33:34,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:33:34,216 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:33:34,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:33:34,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:33:34,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:33:34,218 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:33:34,218 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e951bfa557af694cc1e8699e574c7b4724d1be498cab6731e1080e9fedb61dc3 [2021-11-23 02:33:34,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:33:34,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:33:34,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:33:34,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:33:34,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:33:34,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-23 02:33:34,691 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/data/f301e8819/dc08421b7a544631a4259f49de9a5ab9/FLAGdeed2dfdd [2021-11-23 02:33:35,463 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:33:35,464 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c [2021-11-23 02:33:35,496 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/data/f301e8819/dc08421b7a544631a4259f49de9a5ab9/FLAGdeed2dfdd [2021-11-23 02:33:35,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/data/f301e8819/dc08421b7a544631a4259f49de9a5ab9 [2021-11-23 02:33:35,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:33:35,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:33:35,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:33:35,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:33:35,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:33:35,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:35" (1/1) ... [2021-11-23 02:33:35,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3df73811 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:35, skipping insertion in model container [2021-11-23 02:33:35,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:33:35" (1/1) ... [2021-11-23 02:33:35,625 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:33:35,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:33:36,323 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-23 02:33:36,345 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:33:36,363 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:33:36,515 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/sv-benchmarks/c/openssl/s3_srvr.blast.13.i.cil-2.c[74353,74366] [2021-11-23 02:33:36,519 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:33:36,542 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:33:36,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36 WrapperNode [2021-11-23 02:33:36,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:33:36,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:33:36,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:33:36,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:33:36,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,605 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,659 INFO L137 Inliner]: procedures = 31, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 792 [2021-11-23 02:33:36,660 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:33:36,661 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:33:36,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:33:36,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:33:36,672 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:33:36,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:33:36,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:33:36,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:33:36,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (1/1) ... [2021-11-23 02:33:36,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:33:36,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:33:36,819 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:33:36,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:33:36,879 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:33:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:33:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:33:36,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:33:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:33:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:33:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:33:36,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:33:36,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:33:37,174 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:33:37,180 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:33:37,217 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-23 02:33:40,413 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-23 02:33:40,414 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-23 02:33:40,414 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:33:40,851 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:33:40,852 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:33:40,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:40 BoogieIcfgContainer [2021-11-23 02:33:40,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:33:40,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:33:40,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:33:40,866 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:33:40,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:33:35" (1/3) ... [2021-11-23 02:33:40,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec568e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:40, skipping insertion in model container [2021-11-23 02:33:40,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:33:36" (2/3) ... [2021-11-23 02:33:40,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ec568e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:33:40, skipping insertion in model container [2021-11-23 02:33:40,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:33:40" (3/3) ... [2021-11-23 02:33:40,871 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.13.i.cil-2.c [2021-11-23 02:33:40,878 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:33:40,878 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:33:40,974 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:33:40,989 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:33:40,990 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:33:41,021 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:41,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:33:41,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:41,033 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:41,034 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:41,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1312972884, now seen corresponding path program 1 times [2021-11-23 02:33:41,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:41,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677951850] [2021-11-23 02:33:41,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:41,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:41,608 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:41,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677951850] [2021-11-23 02:33:41,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677951850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:41,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:41,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:41,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156212669] [2021-11-23 02:33:41,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:41,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:41,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:41,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:41,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:41,659 INFO L87 Difference]: Start difference. First operand has 109 states, 107 states have (on average 1.7570093457943925) internal successors, (188), 108 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:43,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:44,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:44,597 INFO L93 Difference]: Finished difference Result 241 states and 416 transitions. [2021-11-23 02:33:44,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-23 02:33:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:44,617 INFO L225 Difference]: With dead ends: 241 [2021-11-23 02:33:44,617 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:44,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:44,626 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 20 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:44,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 390 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:33:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:44,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 115 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 177 transitions. [2021-11-23 02:33:44,682 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 177 transitions. Word has length 29 [2021-11-23 02:33:44,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:44,683 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 177 transitions. [2021-11-23 02:33:44,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 177 transitions. [2021-11-23 02:33:44,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:33:44,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:44,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:44,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:33:44,687 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:44,689 INFO L85 PathProgramCache]: Analyzing trace with hash 112135809, now seen corresponding path program 1 times [2021-11-23 02:33:44,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:44,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27255200] [2021-11-23 02:33:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:44,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:44,858 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:44,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27255200] [2021-11-23 02:33:44,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27255200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:44,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:44,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:44,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499829847] [2021-11-23 02:33:44,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:44,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:44,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:44,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:44,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:44,863 INFO L87 Difference]: Start difference. First operand 116 states and 177 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:46,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:47,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:47,418 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2021-11-23 02:33:47,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-23 02:33:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:47,423 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:33:47,423 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:47,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:47,426 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 19 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:47,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 322 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:33:47,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5304347826086957) internal successors, (176), 115 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 176 transitions. [2021-11-23 02:33:47,461 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 176 transitions. Word has length 39 [2021-11-23 02:33:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:47,461 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 176 transitions. [2021-11-23 02:33:47,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 176 transitions. [2021-11-23 02:33:47,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:33:47,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:47,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:47,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:33:47,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2136319077, now seen corresponding path program 1 times [2021-11-23 02:33:47,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:47,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516385012] [2021-11-23 02:33:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:47,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:47,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:47,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516385012] [2021-11-23 02:33:47,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516385012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:47,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:47,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:47,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144739362] [2021-11-23 02:33:47,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:47,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:47,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:47,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:47,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:47,638 INFO L87 Difference]: Start difference. First operand 116 states and 176 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:49,654 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:50,125 INFO L93 Difference]: Finished difference Result 232 states and 347 transitions. [2021-11-23 02:33:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-23 02:33:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:50,128 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:33:50,128 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:50,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:50,131 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 17 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:50,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 321 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:33:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5217391304347827) internal successors, (175), 115 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 175 transitions. [2021-11-23 02:33:50,146 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 175 transitions. Word has length 40 [2021-11-23 02:33:50,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:50,146 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 175 transitions. [2021-11-23 02:33:50,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:50,147 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 175 transitions. [2021-11-23 02:33:50,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:33:50,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:50,149 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:50,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:33:50,149 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:50,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:50,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1639253873, now seen corresponding path program 1 times [2021-11-23 02:33:50,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813752012] [2021-11-23 02:33:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:50,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:50,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:50,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813752012] [2021-11-23 02:33:50,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813752012] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:50,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:50,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:50,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26381375] [2021-11-23 02:33:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:50,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:50,251 INFO L87 Difference]: Start difference. First operand 116 states and 175 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:52,269 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:52,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:52,730 INFO L93 Difference]: Finished difference Result 232 states and 346 transitions. [2021-11-23 02:33:52,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:52,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 02:33:52,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:52,733 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:33:52,734 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:52,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:52,736 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 15 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:52,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 321 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:33:52,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:52,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5130434782608695) internal successors, (174), 115 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:52,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 174 transitions. [2021-11-23 02:33:52,751 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 174 transitions. Word has length 41 [2021-11-23 02:33:52,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:52,752 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 174 transitions. [2021-11-23 02:33:52,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:52,752 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 174 transitions. [2021-11-23 02:33:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:33:52,754 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:52,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:52,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:33:52,755 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 577562879, now seen corresponding path program 1 times [2021-11-23 02:33:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683075626] [2021-11-23 02:33:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:52,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:52,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:52,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:52,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683075626] [2021-11-23 02:33:52,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683075626] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:52,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:52,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:52,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768767766] [2021-11-23 02:33:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:52,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:52,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:52,895 INFO L87 Difference]: Start difference. First operand 116 states and 174 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:54,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:55,340 INFO L93 Difference]: Finished difference Result 232 states and 345 transitions. [2021-11-23 02:33:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:55,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 02:33:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:55,344 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:33:55,344 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:55,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:55,347 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 11 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:55,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 321 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:33:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.5043478260869565) internal successors, (173), 115 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 173 transitions. [2021-11-23 02:33:55,360 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 173 transitions. Word has length 41 [2021-11-23 02:33:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 173 transitions. [2021-11-23 02:33:55,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:55,361 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 173 transitions. [2021-11-23 02:33:55,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:33:55,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:55,363 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:55,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:33:55,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:55,365 INFO L85 PathProgramCache]: Analyzing trace with hash 674278859, now seen corresponding path program 1 times [2021-11-23 02:33:55,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:55,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394278158] [2021-11-23 02:33:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:55,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:55,452 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:55,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394278158] [2021-11-23 02:33:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394278158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:55,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:55,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:55,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984486648] [2021-11-23 02:33:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:55,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:55,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:55,455 INFO L87 Difference]: Start difference. First operand 116 states and 173 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:57,469 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:33:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:33:57,897 INFO L93 Difference]: Finished difference Result 232 states and 344 transitions. [2021-11-23 02:33:57,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:33:57,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 02:33:57,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:33:57,901 INFO L225 Difference]: With dead ends: 232 [2021-11-23 02:33:57,901 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 02:33:57,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:33:57,903 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:33:57,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 322 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:33:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 02:33:57,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 116. [2021-11-23 02:33:57,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4956521739130435) internal successors, (172), 115 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 172 transitions. [2021-11-23 02:33:57,932 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 172 transitions. Word has length 41 [2021-11-23 02:33:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:33:57,932 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 172 transitions. [2021-11-23 02:33:57,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:33:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 172 transitions. [2021-11-23 02:33:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:33:57,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:33:57,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:33:57,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:33:57,942 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:33:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:33:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1359286569, now seen corresponding path program 1 times [2021-11-23 02:33:57,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:33:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523206758] [2021-11-23 02:33:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:33:57,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:33:57,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:33:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:33:58,089 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:33:58,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523206758] [2021-11-23 02:33:58,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523206758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:33:58,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:33:58,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:33:58,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744273622] [2021-11-23 02:33:58,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:33:58,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:33:58,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:33:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:33:58,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:33:58,096 INFO L87 Difference]: Start difference. First operand 116 states and 172 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:00,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:00,534 INFO L93 Difference]: Finished difference Result 230 states and 341 transitions. [2021-11-23 02:34:00,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 02:34:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:00,538 INFO L225 Difference]: With dead ends: 230 [2021-11-23 02:34:00,538 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 02:34:00,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:00,540 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 9 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:00,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 325 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:00,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 02:34:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-23 02:34:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4869565217391305) internal successors, (171), 115 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 171 transitions. [2021-11-23 02:34:00,567 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 171 transitions. Word has length 42 [2021-11-23 02:34:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:00,568 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 171 transitions. [2021-11-23 02:34:00,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 171 transitions. [2021-11-23 02:34:00,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:34:00,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:00,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:00,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:34:00,571 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:00,574 INFO L85 PathProgramCache]: Analyzing trace with hash -415502282, now seen corresponding path program 1 times [2021-11-23 02:34:00,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:00,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718610138] [2021-11-23 02:34:00,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:00,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:00,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:00,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:00,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718610138] [2021-11-23 02:34:00,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718610138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:00,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:00,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:00,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881273858] [2021-11-23 02:34:00,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:00,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:00,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:00,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:00,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:00,707 INFO L87 Difference]: Start difference. First operand 116 states and 171 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:02,718 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:03,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:03,085 INFO L93 Difference]: Finished difference Result 230 states and 340 transitions. [2021-11-23 02:34:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:03,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-23 02:34:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:03,088 INFO L225 Difference]: With dead ends: 230 [2021-11-23 02:34:03,089 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 02:34:03,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:03,090 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 11 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:03,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 325 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 02:34:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-23 02:34:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4782608695652173) internal successors, (170), 115 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:03,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 170 transitions. [2021-11-23 02:34:03,099 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 170 transitions. Word has length 42 [2021-11-23 02:34:03,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:03,100 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 170 transitions. [2021-11-23 02:34:03,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 170 transitions. [2021-11-23 02:34:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 02:34:03,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:03,102 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:03,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:34:03,102 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:03,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:03,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1473133036, now seen corresponding path program 1 times [2021-11-23 02:34:03,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:03,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825521964] [2021-11-23 02:34:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:03,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:03,180 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:03,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825521964] [2021-11-23 02:34:03,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825521964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:03,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:03,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:34:03,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802052383] [2021-11-23 02:34:03,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:03,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:03,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:03,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:03,183 INFO L87 Difference]: Start difference. First operand 116 states and 170 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:05,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:05,520 INFO L93 Difference]: Finished difference Result 222 states and 329 transitions. [2021-11-23 02:34:05,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:05,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-23 02:34:05,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:05,523 INFO L225 Difference]: With dead ends: 222 [2021-11-23 02:34:05,523 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 02:34:05,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:05,525 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 5 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:05,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 335 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 138 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:34:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 02:34:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2021-11-23 02:34:05,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.4695652173913043) internal successors, (169), 115 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:05,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 169 transitions. [2021-11-23 02:34:05,533 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 169 transitions. Word has length 43 [2021-11-23 02:34:05,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:05,533 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 169 transitions. [2021-11-23 02:34:05,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 169 transitions. [2021-11-23 02:34:05,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 02:34:05,535 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:05,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:05,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:34:05,535 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:05,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash -829232749, now seen corresponding path program 1 times [2021-11-23 02:34:05,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:05,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809278862] [2021-11-23 02:34:05,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:05,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:05,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:05,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809278862] [2021-11-23 02:34:05,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809278862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:05,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:05,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:05,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917328931] [2021-11-23 02:34:05,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:05,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:05,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:05,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:05,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:05,642 INFO L87 Difference]: Start difference. First operand 116 states and 169 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:07,655 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:08,040 INFO L93 Difference]: Finished difference Result 254 states and 377 transitions. [2021-11-23 02:34:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:08,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-23 02:34:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:08,043 INFO L225 Difference]: With dead ends: 254 [2021-11-23 02:34:08,044 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 02:34:08,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:08,045 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 21 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:08,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 330 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 02:34:08,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-11-23 02:34:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.5037037037037038) internal successors, (203), 135 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 203 transitions. [2021-11-23 02:34:08,054 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 203 transitions. Word has length 44 [2021-11-23 02:34:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:08,055 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 203 transitions. [2021-11-23 02:34:08,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 203 transitions. [2021-11-23 02:34:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:34:08,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:08,056 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:08,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:34:08,057 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1794135296, now seen corresponding path program 1 times [2021-11-23 02:34:08,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330123111] [2021-11-23 02:34:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:08,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:08,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330123111] [2021-11-23 02:34:08,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330123111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:08,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:08,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:08,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522523491] [2021-11-23 02:34:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:08,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:08,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:08,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:08,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:08,145 INFO L87 Difference]: Start difference. First operand 136 states and 203 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:10,159 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:10,572 INFO L93 Difference]: Finished difference Result 274 states and 410 transitions. [2021-11-23 02:34:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-23 02:34:10,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:10,575 INFO L225 Difference]: With dead ends: 274 [2021-11-23 02:34:10,576 INFO L226 Difference]: Without dead ends: 150 [2021-11-23 02:34:10,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:10,577 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 32 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:10,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 332 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-23 02:34:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 136. [2021-11-23 02:34:10,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.4962962962962962) internal successors, (202), 135 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:10,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 202 transitions. [2021-11-23 02:34:10,585 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 202 transitions. Word has length 54 [2021-11-23 02:34:10,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:10,586 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 202 transitions. [2021-11-23 02:34:10,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:10,587 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 202 transitions. [2021-11-23 02:34:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:34:10,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:10,588 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:10,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:34:10,588 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:10,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1533942532, now seen corresponding path program 1 times [2021-11-23 02:34:10,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306492887] [2021-11-23 02:34:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:10,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:10,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:34:10,709 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:10,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306492887] [2021-11-23 02:34:10,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306492887] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:10,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:10,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:34:10,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512450960] [2021-11-23 02:34:10,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:10,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:34:10,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:10,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:34:10,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:10,712 INFO L87 Difference]: Start difference. First operand 136 states and 202 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:12,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:13,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:13,320 INFO L93 Difference]: Finished difference Result 277 states and 415 transitions. [2021-11-23 02:34:13,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:34:13,322 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-23 02:34:13,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:13,324 INFO L225 Difference]: With dead ends: 277 [2021-11-23 02:34:13,324 INFO L226 Difference]: Without dead ends: 153 [2021-11-23 02:34:13,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:34:13,325 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 118 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:13,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 231 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 271 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:34:13,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-23 02:34:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-23 02:34:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4701986754966887) internal successors, (222), 151 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 222 transitions. [2021-11-23 02:34:13,335 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 222 transitions. Word has length 55 [2021-11-23 02:34:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:13,336 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 222 transitions. [2021-11-23 02:34:13,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:13,336 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 222 transitions. [2021-11-23 02:34:13,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:34:13,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:13,337 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:13,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:34:13,338 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1754499321, now seen corresponding path program 1 times [2021-11-23 02:34:13,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:13,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545694795] [2021-11-23 02:34:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:13,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:13,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:13,420 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:13,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545694795] [2021-11-23 02:34:13,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545694795] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:13,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:13,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:13,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767363720] [2021-11-23 02:34:13,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:13,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:13,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:13,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:13,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:13,423 INFO L87 Difference]: Start difference. First operand 152 states and 222 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:15,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:15,847 INFO L93 Difference]: Finished difference Result 306 states and 447 transitions. [2021-11-23 02:34:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:15,849 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:34:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:15,851 INFO L225 Difference]: With dead ends: 306 [2021-11-23 02:34:15,851 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 02:34:15,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:15,852 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 30 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:15,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 332 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 02:34:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-23 02:34:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4635761589403973) internal successors, (221), 151 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 221 transitions. [2021-11-23 02:34:15,863 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 221 transitions. Word has length 56 [2021-11-23 02:34:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:15,863 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 221 transitions. [2021-11-23 02:34:15,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:15,864 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 221 transitions. [2021-11-23 02:34:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:34:15,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:15,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:15,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:34:15,865 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:15,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2071366590, now seen corresponding path program 1 times [2021-11-23 02:34:15,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:15,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113289250] [2021-11-23 02:34:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:15,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:15,939 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:15,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:15,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113289250] [2021-11-23 02:34:15,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113289250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:15,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:15,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:15,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875630174] [2021-11-23 02:34:15,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:15,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:15,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:15,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:15,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:15,943 INFO L87 Difference]: Start difference. First operand 152 states and 221 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:17,956 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:18,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:18,398 INFO L93 Difference]: Finished difference Result 306 states and 445 transitions. [2021-11-23 02:34:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:18,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:34:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:18,402 INFO L225 Difference]: With dead ends: 306 [2021-11-23 02:34:18,402 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 02:34:18,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:18,404 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 25 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:18,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 332 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:18,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 02:34:18,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-23 02:34:18,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4569536423841059) internal successors, (220), 151 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 220 transitions. [2021-11-23 02:34:18,413 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 220 transitions. Word has length 56 [2021-11-23 02:34:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:18,414 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 220 transitions. [2021-11-23 02:34:18,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 220 transitions. [2021-11-23 02:34:18,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:34:18,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:18,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:18,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:34:18,416 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:18,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:18,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2126884726, now seen corresponding path program 1 times [2021-11-23 02:34:18,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:18,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587768883] [2021-11-23 02:34:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:18,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:18,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587768883] [2021-11-23 02:34:18,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587768883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:18,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:18,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:18,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402211190] [2021-11-23 02:34:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:18,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:18,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:18,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:18,492 INFO L87 Difference]: Start difference. First operand 152 states and 220 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:20,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:20,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:20,980 INFO L93 Difference]: Finished difference Result 306 states and 443 transitions. [2021-11-23 02:34:20,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:20,982 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-11-23 02:34:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:20,983 INFO L225 Difference]: With dead ends: 306 [2021-11-23 02:34:20,984 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 02:34:20,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:20,985 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 23 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:20,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 333 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 163 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:34:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 02:34:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-23 02:34:20,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4503311258278146) internal successors, (219), 151 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 219 transitions. [2021-11-23 02:34:20,994 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 219 transitions. Word has length 56 [2021-11-23 02:34:20,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:20,995 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 219 transitions. [2021-11-23 02:34:20,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 219 transitions. [2021-11-23 02:34:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 02:34:20,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:20,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:20,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:34:20,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1188583507, now seen corresponding path program 1 times [2021-11-23 02:34:20,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:20,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225270872] [2021-11-23 02:34:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:20,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:21,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:21,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225270872] [2021-11-23 02:34:21,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225270872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:21,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:21,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:21,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333263837] [2021-11-23 02:34:21,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:21,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:21,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:21,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:21,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:21,078 INFO L87 Difference]: Start difference. First operand 152 states and 219 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:23,091 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:23,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:23,473 INFO L93 Difference]: Finished difference Result 306 states and 441 transitions. [2021-11-23 02:34:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:23,476 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 02:34:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:23,477 INFO L225 Difference]: With dead ends: 306 [2021-11-23 02:34:23,477 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 02:34:23,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:23,479 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 27 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:23,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 332 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 02:34:23,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 152. [2021-11-23 02:34:23,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4437086092715232) internal successors, (218), 151 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:23,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 218 transitions. [2021-11-23 02:34:23,489 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 218 transitions. Word has length 57 [2021-11-23 02:34:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:23,490 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 218 transitions. [2021-11-23 02:34:23,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:23,490 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 218 transitions. [2021-11-23 02:34:23,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 02:34:23,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:23,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:23,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:34:23,492 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:23,493 INFO L85 PathProgramCache]: Analyzing trace with hash 422561354, now seen corresponding path program 1 times [2021-11-23 02:34:23,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:23,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114093738] [2021-11-23 02:34:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:23,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:23,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:23,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114093738] [2021-11-23 02:34:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114093738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:23,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:23,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:23,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419661767] [2021-11-23 02:34:23,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:23,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:23,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:23,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:23,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:23,571 INFO L87 Difference]: Start difference. First operand 152 states and 218 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:25,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:25,996 INFO L93 Difference]: Finished difference Result 304 states and 437 transitions. [2021-11-23 02:34:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:25,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 02:34:25,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:25,999 INFO L225 Difference]: With dead ends: 304 [2021-11-23 02:34:26,000 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 02:34:26,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:26,001 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 22 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:26,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 336 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 02:34:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2021-11-23 02:34:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4370860927152318) internal successors, (217), 151 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 217 transitions. [2021-11-23 02:34:26,013 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 217 transitions. Word has length 57 [2021-11-23 02:34:26,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:26,015 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 217 transitions. [2021-11-23 02:34:26,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 217 transitions. [2021-11-23 02:34:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:34:26,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:26,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:26,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:34:26,017 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:26,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -416300532, now seen corresponding path program 1 times [2021-11-23 02:34:26,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:26,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728372840] [2021-11-23 02:34:26,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:26,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:26,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:26,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728372840] [2021-11-23 02:34:26,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728372840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:26,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:26,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:26,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748901608] [2021-11-23 02:34:26,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:26,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:26,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:26,139 INFO L87 Difference]: Start difference. First operand 152 states and 217 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:28,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:28,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:28,585 INFO L93 Difference]: Finished difference Result 304 states and 435 transitions. [2021-11-23 02:34:28,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:28,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-23 02:34:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:28,589 INFO L225 Difference]: With dead ends: 304 [2021-11-23 02:34:28,589 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 02:34:28,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:28,590 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 24 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:28,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 336 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 160 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:28,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 02:34:28,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 152. [2021-11-23 02:34:28,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4304635761589404) internal successors, (216), 151 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:28,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2021-11-23 02:34:28,600 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 58 [2021-11-23 02:34:28,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:28,600 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2021-11-23 02:34:28,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:28,601 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2021-11-23 02:34:28,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 02:34:28,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:28,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:28,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:34:28,602 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:28,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1274236680, now seen corresponding path program 1 times [2021-11-23 02:34:28,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:28,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782965103] [2021-11-23 02:34:28,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:28,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:28,673 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:28,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782965103] [2021-11-23 02:34:28,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782965103] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:28,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:28,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:28,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389477197] [2021-11-23 02:34:28,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:28,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:28,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:28,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:28,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:28,678 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:30,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:31,065 INFO L93 Difference]: Finished difference Result 296 states and 424 transitions. [2021-11-23 02:34:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:31,066 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-23 02:34:31,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:31,070 INFO L225 Difference]: With dead ends: 296 [2021-11-23 02:34:31,070 INFO L226 Difference]: Without dead ends: 156 [2021-11-23 02:34:31,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:31,072 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 18 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:31,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 344 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 152 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 02:34:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-23 02:34:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-11-23 02:34:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.423841059602649) internal successors, (215), 151 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:31,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 215 transitions. [2021-11-23 02:34:31,084 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 215 transitions. Word has length 59 [2021-11-23 02:34:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:31,084 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 215 transitions. [2021-11-23 02:34:31,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:31,085 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 215 transitions. [2021-11-23 02:34:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 02:34:31,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:31,086 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:31,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:34:31,087 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:31,087 INFO L85 PathProgramCache]: Analyzing trace with hash 2085622853, now seen corresponding path program 1 times [2021-11-23 02:34:31,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:31,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520365129] [2021-11-23 02:34:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:31,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:31,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:31,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520365129] [2021-11-23 02:34:31,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520365129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:31,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636459529] [2021-11-23 02:34:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:31,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:31,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:31,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:34:31,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:31,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:34:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:31,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:32,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636459529] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:32,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:34:32,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-23 02:34:32,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163332023] [2021-11-23 02:34:32,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:32,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:32,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:32,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:32,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:32,096 INFO L87 Difference]: Start difference. First operand 152 states and 215 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:34,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:34,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:34,276 INFO L93 Difference]: Finished difference Result 293 states and 418 transitions. [2021-11-23 02:34:34,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:34,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 02:34:34,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:34,281 INFO L225 Difference]: With dead ends: 293 [2021-11-23 02:34:34,281 INFO L226 Difference]: Without dead ends: 291 [2021-11-23 02:34:34,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:34,282 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 116 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:34,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 274 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:34:34,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-23 02:34:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 288. [2021-11-23 02:34:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.4425087108013936) internal successors, (414), 287 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 414 transitions. [2021-11-23 02:34:34,300 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 414 transitions. Word has length 62 [2021-11-23 02:34:34,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:34,301 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 414 transitions. [2021-11-23 02:34:34,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:34,301 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 414 transitions. [2021-11-23 02:34:34,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 02:34:34,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:34,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:34,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:34,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:34,529 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:34,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash 59707972, now seen corresponding path program 1 times [2021-11-23 02:34:34,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:34,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967010467] [2021-11-23 02:34:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:34,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:34,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967010467] [2021-11-23 02:34:34,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967010467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:34,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737573246] [2021-11-23 02:34:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:34,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:34,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:34,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:34,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:34:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:34,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:34:34,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:34:35,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:35,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737573246] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:35,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:34:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-11-23 02:34:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194758573] [2021-11-23 02:34:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:35,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:34:35,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:34:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:35,466 INFO L87 Difference]: Start difference. First operand 288 states and 414 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:37,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:37,679 INFO L93 Difference]: Finished difference Result 561 states and 812 transitions. [2021-11-23 02:34:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:34:37,680 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-23 02:34:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:37,684 INFO L225 Difference]: With dead ends: 561 [2021-11-23 02:34:37,685 INFO L226 Difference]: Without dead ends: 559 [2021-11-23 02:34:37,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:34:37,686 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 110 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:37,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 273 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:34:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-11-23 02:34:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 550. [2021-11-23 02:34:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.4553734061930783) internal successors, (799), 549 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 799 transitions. [2021-11-23 02:34:37,719 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 799 transitions. Word has length 68 [2021-11-23 02:34:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 799 transitions. [2021-11-23 02:34:37,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 799 transitions. [2021-11-23 02:34:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:34:37,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:37,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:37,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:34:37,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:34:37,936 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:37,937 INFO L85 PathProgramCache]: Analyzing trace with hash 161221736, now seen corresponding path program 1 times [2021-11-23 02:34:37,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:37,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822753818] [2021-11-23 02:34:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:37,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:38,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:38,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822753818] [2021-11-23 02:34:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822753818] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:38,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:38,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:38,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622263304] [2021-11-23 02:34:38,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:38,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:38,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:38,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:38,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:38,073 INFO L87 Difference]: Start difference. First operand 550 states and 799 transitions. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:40,090 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:40,898 INFO L93 Difference]: Finished difference Result 909 states and 1327 transitions. [2021-11-23 02:34:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:40,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-11-23 02:34:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:40,905 INFO L225 Difference]: With dead ends: 909 [2021-11-23 02:34:40,906 INFO L226 Difference]: Without dead ends: 638 [2021-11-23 02:34:40,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:40,908 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 81 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:40,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 464 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:34:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-11-23 02:34:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 576. [2021-11-23 02:34:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 1.4678260869565218) internal successors, (844), 575 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 844 transitions. [2021-11-23 02:34:40,946 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 844 transitions. Word has length 95 [2021-11-23 02:34:40,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:40,946 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 844 transitions. [2021-11-23 02:34:40,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 844 transitions. [2021-11-23 02:34:40,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-23 02:34:40,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:40,981 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:40,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:34:40,982 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:40,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1203422806, now seen corresponding path program 1 times [2021-11-23 02:34:40,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:40,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022957442] [2021-11-23 02:34:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:40,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:41,077 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:41,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022957442] [2021-11-23 02:34:41,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022957442] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:41,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:41,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:41,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423071837] [2021-11-23 02:34:41,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:41,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:41,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:41,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:41,080 INFO L87 Difference]: Start difference. First operand 576 states and 844 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:43,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:43,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:43,796 INFO L93 Difference]: Finished difference Result 927 states and 1358 transitions. [2021-11-23 02:34:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:43,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-23 02:34:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:43,804 INFO L225 Difference]: With dead ends: 927 [2021-11-23 02:34:43,804 INFO L226 Difference]: Without dead ends: 630 [2021-11-23 02:34:43,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:43,806 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 70 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:43,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 454 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:34:43,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-23 02:34:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 577. [2021-11-23 02:34:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.4670138888888888) internal successors, (845), 576 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 845 transitions. [2021-11-23 02:34:43,839 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 845 transitions. Word has length 96 [2021-11-23 02:34:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:43,840 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 845 transitions. [2021-11-23 02:34:43,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:43,841 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 845 transitions. [2021-11-23 02:34:43,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:34:43,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:43,843 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:43,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:34:43,844 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:43,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:43,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1725366876, now seen corresponding path program 1 times [2021-11-23 02:34:43,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:43,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350081028] [2021-11-23 02:34:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:43,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:43,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350081028] [2021-11-23 02:34:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350081028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:43,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424390608] [2021-11-23 02:34:43,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:43,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:43,945 INFO L87 Difference]: Start difference. First operand 577 states and 845 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:45,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:46,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:46,676 INFO L93 Difference]: Finished difference Result 928 states and 1358 transitions. [2021-11-23 02:34:46,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:46,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-23 02:34:46,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:46,684 INFO L225 Difference]: With dead ends: 928 [2021-11-23 02:34:46,684 INFO L226 Difference]: Without dead ends: 630 [2021-11-23 02:34:46,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:46,686 INFO L933 BasicCegarLoop]: 191 mSDtfsCounter, 86 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:46,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 452 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:34:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-23 02:34:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 577. [2021-11-23 02:34:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.4652777777777777) internal successors, (844), 576 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:46,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 844 transitions. [2021-11-23 02:34:46,718 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 844 transitions. Word has length 107 [2021-11-23 02:34:46,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:46,718 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 844 transitions. [2021-11-23 02:34:46,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:46,719 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 844 transitions. [2021-11-23 02:34:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:34:46,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:46,721 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:46,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:34:46,722 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:46,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1256265491, now seen corresponding path program 1 times [2021-11-23 02:34:46,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:46,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165889816] [2021-11-23 02:34:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:46,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:46,816 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165889816] [2021-11-23 02:34:46,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165889816] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:46,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:46,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:46,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253231291] [2021-11-23 02:34:46,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:46,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:46,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:46,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:46,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:46,819 INFO L87 Difference]: Start difference. First operand 577 states and 844 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:48,840 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:49,417 INFO L93 Difference]: Finished difference Result 928 states and 1356 transitions. [2021-11-23 02:34:49,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:49,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-23 02:34:49,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:49,424 INFO L225 Difference]: With dead ends: 928 [2021-11-23 02:34:49,424 INFO L226 Difference]: Without dead ends: 630 [2021-11-23 02:34:49,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:49,426 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 81 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:49,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 450 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 267 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:34:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-23 02:34:49,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 577. [2021-11-23 02:34:49,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.4635416666666667) internal successors, (843), 576 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 843 transitions. [2021-11-23 02:34:49,458 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 843 transitions. Word has length 107 [2021-11-23 02:34:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:49,459 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 843 transitions. [2021-11-23 02:34:49,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 843 transitions. [2021-11-23 02:34:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:34:49,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:49,462 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:49,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:34:49,462 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1352981471, now seen corresponding path program 1 times [2021-11-23 02:34:49,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:49,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507309416] [2021-11-23 02:34:49,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:49,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:49,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-23 02:34:49,613 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:49,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507309416] [2021-11-23 02:34:49,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507309416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:34:49,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:34:49,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:34:49,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847371061] [2021-11-23 02:34:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:34:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:34:49,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:34:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:34:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:34:49,617 INFO L87 Difference]: Start difference. First operand 577 states and 843 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:51,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:34:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:34:52,259 INFO L93 Difference]: Finished difference Result 1480 states and 2187 transitions. [2021-11-23 02:34:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:34:52,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-23 02:34:52,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:34:52,268 INFO L225 Difference]: With dead ends: 1480 [2021-11-23 02:34:52,269 INFO L226 Difference]: Without dead ends: 915 [2021-11-23 02:34:52,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:34:52,271 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 83 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:34:52,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 468 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 289 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:34:52,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2021-11-23 02:34:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 681. [2021-11-23 02:34:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.5044117647058823) internal successors, (1023), 680 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1023 transitions. [2021-11-23 02:34:52,313 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1023 transitions. Word has length 107 [2021-11-23 02:34:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:34:52,313 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 1023 transitions. [2021-11-23 02:34:52,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:34:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1023 transitions. [2021-11-23 02:34:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:34:52,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:34:52,316 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:34:52,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:34:52,317 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:34:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:34:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash -673405073, now seen corresponding path program 1 times [2021-11-23 02:34:52,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:34:52,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742963004] [2021-11-23 02:34:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:52,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:34:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:34:52,487 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:34:52,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742963004] [2021-11-23 02:34:52,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742963004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:34:52,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42715687] [2021-11-23 02:34:52,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:34:52,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:34:52,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:34:52,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:34:52,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c20b8624-8073-4584-b794-7029582f2abd/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:34:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:34:52,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:34:52,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:34:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:34:53,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:34:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 02:34:53,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42715687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:34:53,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [33443496] [2021-11-23 02:34:53,859 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2021-11-23 02:34:53,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:34:53,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:34:53,871 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:34:53,872 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs